Common Core
G-SRT.C.6
3 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Geometry · Chapter 5 · Lesson 1
Similarity is why they work at all.
Geometry · Chapter 5 · Lesson 3
Two triangles worth knowing by heart.
Integrated Math 2 · Chapter 5 · Lesson 1
The Three Trigonometric Ratios
Similarity gives every right triangle a fingerprint.